MountieApp vs GraphNCalc83
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MountieApp
Access essential campus information for Mt. SAC, including faculty contacts, a campus map, event listings, and college news. Stay updated on your grades, class schedule, and registration details, all from your mobile device.
- Faculty and staff directory
- Interactive campus map
- College event listings
- Campus news updates
- Student grades access
- Daily class schedule
- Course catalog access
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MountieAPP, the official Mt. SAC mobile application, provides you with faculty and staff contact information, a campus map with a list of buildings, college events, campus news, student grades, daily class schedule, registration hold information, and access to an electronic copy of the course catalog. On campus or on the go, access all-things Mt. SAC wherever you are 24/7 from your mobile devices.
GraphNCalc83
This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.
- Touch-based graphing and editing
- Natural textbook notation input
- Advanced math and statistical functions
- Parametric, polar, and f(x,y) equation graphing
- BASIC programming with fast execution
- Unit converter and physical constants
- Interactive periodic table
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GraphNCalc83 uses touch, color and blazing speed to handle your math problems. The familiar calculator keyboard, arrow keys and functions are enhanced with full touch input for all graphs, editors and menus. Enter calculations in natural textbook format. Enter fractions and view result as fractions. Trace graphs with your finger. Zoom in and out with a pinch. Explore regressions with a tap on the screen. Scroll through the list, matrix and calculation history with a swipe. Tap the ? key for help. Written using the latest 64 bit math libraries, GraphNCalc83 harnesses the amazing computing resources of the iPhone and iPad to provide a colorful, fast and fluid experience. Graphs scroll, glide and zoom smoothly. Matrix, statistics and BASIC programs run 500x times faster than traditional calculators. GraphNCalc83 includes: Algebraic entry: Enter problems using full algebraic textbook notation. The command line editor includes interactive parenthesis matching and high lighting, undo and redo, bubble function help and a 200 level calculation history and recall stack. Generate a PDF report of calculations for mailing or printing using the SEND function. Math functions: Trigonometry, logarithms, function minimum, maximum, numeric integration and derivatives, general solver, real and imaginary numbers, combination, permutation, random number generation, normal, T, chi squared, Fisher, poisson and geometric distributions, binary shift and rotate, test and logic operations, list operations including sort, std. deviation, sum, sequence, matrix determinant, transpose, sum, ref, rref, addition, multiplication. Graph functions, parametric, f(x,y) and polar equations and statistics plots: Full color graphs with touch to trace, pinch zoom, function minimum, maximum, intersections, asymptotes and numeric integration. Output graphs in high resolution PDF format for mailing or printing. Interactively explore function behavior using variables tied to slider bars. Statistics, Inferential Statistics and Distributions: A set of inferential statistics worksheets and graphs of distributions are included. The regression analysis screen allows you to quickly compute, view and analyze a data set using a variety of curve fitting methods. Table: Analyze functions using the table viewer. Use the split screen mode to simultaneously view a graph and table. Matrix and Lists: Matrix and list editors and a full set of matrix and list operations are built in. Unit Converter and Constants: Convert between a wide variety of scientific, engineering and common units. A large set of physical constants are also included. BASIC programming: Create, edit, debug and run BASIC programs. Programs run more than 500 times faster than traditional calculators. Import and execute .83p and .8xp files. Chemistry: The calculator includes a full featured periodic table, a mass calculator and a data base of element properties. The touch interface allows you to view and interact with the periodic table to view by series, state, melting point, boiling point, electronegativity, electron affinity, valence, ionization, radius, hardness, modulus, density, conductivity, heat and year discovered. Geometry: The geometry application computes perimeter and area for a variety of 2d geometric figures including squares, rectangles, parallelograms, triangles, polygons, circles, arcs and ellipses. A full triangle solver and interactive unit circle grapher are built in. Solve line intersections, project a point to a line and find a circle given 3 points. Finance: Compute time value of money problems including annuities, lump sums and uneven cash flow analysis with IRR and NPV Built-in user guide: A user guide is included and is a touch away using the ? key or ⓘ on any menu. All functions have a full manual page with description of arguments and examples of use. Pop up bubble help displays function arguments during problem entry and program editing.
Screenshots
Verdict
The clearest difference is price: MountieApp at Free against GraphNCalc83's $12.99. GraphNCalc83's advantage is review sentiment (98% vs 53%) and rating (4.9 vs 2.8). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
MountieApp is free to download; GraphNCalc83 costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
GraphNCalc83 holds the better App Store score, 4.9 against 2.8. That said, the two scores are not equally well evidenced: GraphNCalc83 has 4K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 53% of MountieApp's written reviews are positive against 98% of GraphNCalc83's.
MountieApp ships an update every 10 months, GraphNCalc83 every 5 months. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.
| Parameter | MountieApp | GraphNCalc83 |
|---|---|---|
| Price | Free — better | $12.99 |
| Rating | 2.8 (6 ratings) | 4.9 (4K ratings) — better |
| Positive reviews | 53.2% of reviews | 98.1% of reviews — better |
| Number of ratings | 6 | 4K — better |
| Update frequency | Every 10 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #24 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 23 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Mt. San Antonio College | Ernest Brock |
Customer experience
MountieApp
GraphNCalc83
User reviews
MountieApp
From 6 App Store ratingsWhat we love
- 👍 Convenient access to student info
- 🗺️ Helpful campus map navigation
- 🗓️ Easy access to class schedules
- ✅ Streamlined course registration
- 💰 Quick fee payment access
Room to improve
- ❌ Frequent login issues
- ⚪ White screen on launch
- 🔄 Constant re-login required
- 📉 Redirects to website not mobile-friendly
- 🐌 Slow performance
GraphNCalc83
From 4K App Store ratingsWhat we love
- 👍 Familiar TI-83/84 calculator interface
- 🚀 Powerful and feature-rich
- 💡 Touchscreen enhancements like zooming and tracing
- 👍 Convenient to have a graphing calculator on your phone
- 👍 Frequent updates and great developer support
Room to improve
- 🐛 Occasional issues with graph rendering and zooming
- ⚠️ Not allowed to use on tests/exams like physical calculators
Bugs and requests
MountieApp
Reported bugs
11 issues- App crashes on login
- White screen upon opening
- Kicked out after sign-in attempt
- Not supported with iOS 18 update
- App crashes when selecting items
Show 6 moreShow fewer
- Logged out upon crashing
- Login failed errors
- App slows down iPhone
- Assistive features upside down
- Incompatible with older iPhones
- App hangs and crashes on iOS 6 betas
Requested features
10 requests- Stay logged in feature
- In-app course catalog search
- Add career/job opportunities tab
- Save login information
- Email access within the app
Show 5 moreShow fewer
- Community Ed classes section
- Integration with Google Maps for location
- Ability to view waitlist positions
- Full portal functionality in app
- Remember me feature improvement
GraphNCalc83
Reported bugs
2 issues- Occasional crashes or freezes
- Inconsistent behavior when scrolling through calculation history
Requested features
3 requests- Dark mode or customizable themes
- More advanced programming and scripting capabilities
- Support for additional calculator models (e.g., TI-89)
In-app purchases
MountieApp
No in-app purchases
GraphNCalc83
No in-app purchases









